Halogenated esters of phosphorus-containing acids

ABSTRACT

This invention deals with new phosphorus-containing esters having the formula   WHEREIN N IS AN INTEGER HAVING A VALUE OF AT LEAST 1; Z represents an organic moiety having a valency of n; R represents a divalent hydrocarbon radical containing 1-20 carbon atoms; R&#39;&#39; represents X, hydrogen or R&#39;&#39;&#39;&#39;; R&#39;&#39;&#39;&#39; represents a monovalent hydrocarbon radical containing 1-20 carbon atoms; and X represents chlorine or bromine. These new esters are useful particularly as fire retardants, agricultural chemicals, fuel additives, plasticizers, monomers and intermediates for the synthesis of other useful derivatives.

lllfv l l li United Sta DAlelio [76] Inventor: Gaetano F. DAlelio, 2011 E. Cedar St., South Bend, 1nd. 46617 [22] Filed: July 30, 1973 [2]] Appl. No.: 383,599

Related US. Application Data [63] Continuationin-part of Ser. No. 179,543, Sept. 10, 1971, Pat. No. 3,780,144, which is a continuation of Ser. No. 785,335, Dec. 19, 1968, abandoned.

[52] US. Cl 260/952; 106/15 FP; 117/136; 260/45.7 PS; 260/45.7; 260/45.85; 260/45.9; 260/45.95; 260/348 R; 260/932; 260/941; 260/943; 260/944; 260/945; 260/946; 260/948; 260/949; 260/950; 260/951; 260/953; 260/956 [51 Int. Cl. C07f 9/40 [58] Field of Search 260/952, 941, 953, 969, 260/956, 932, 943, 944, 945, 946, 948, 949, 260/950, 951

[56] References Cited UNITED STATES PATENTS 2,973,380 2/1961 Swcm 260/941 X 3,030,347 4/1962 O'Brien ct al. 260/953 X 3,468,982 9/1969 Klein et al. 260/941 3,679,712 7/1972 Firestone 260/952 OTHER PUBLlCATlONS Kosolapoff, Organo Phosphorus Compounds, John Aug. 19, 1975 Wiley & Sons, Inc., London, (1950) pages 121 and Primary E.\'aniinerAnton H. Sutto Assixmnt ExuminerRichard L. Raymond Attorney, Agent, or FirmWalter J. Monacelli 5 7 ABSTRACT This invention deals with new phosphorus-containing esters having the formula radical 14 Claims, N0 Drawings HALOGENATED ESTERS OF PHOSPHORUS-CONTAINING ACIDS This application is a continuation-in-part of copending application Ser. No. 179.543, filed Sept. 10. I971, issued on Dec. 18, 1973, as US. Pat. No. 3,780,144, which in turn is a continuation of application Ser. No.

785,335, filed Dec. 19, 1968, now abandoned.

BACKGROUND OF THE INVENTION 1. Field of the Invention:

This invention involves new esters containing both phosphorus and halogen atoms in their structures. More specifically, it concerns the phosphonium esters of halogenated acetylenic alcohols.

2. Related Prior Art:

No pertinent prior art is known.

STATEMENT OF THE INVENTION The esters of this invention are represented by the formula:

wherein n is an integer having a value of at least 1; Z represents an organic moiety having a valency of n; R represents a divalent hydrocarbon radical containing 1-20 carbon atoms; R represents X, hydrogen or R"; R" represents a monovalent hydrocarbon radical containing lcarbon atoms; and X represents chlorine or bromine. The esters of this invention are prepared readily by the following reaction using one mole of phosphite reagent per -CH X group to be reacted:

wherein Y' represents H or --RCX=CXR' with the byproduct Y'X representing HX or XRCX=CXR both of which may be distilled from the reaction mass leaving the desired product as the residue.

This reaction may be activated by the presence of a small amount of a peroxy compound such as benzoyl peroxide. However this may not be desirable when an easily polymerizable compound is being prepared in which case the activation may be effected thermally and advantageously in the presence of a polymerization inhibitor such as t-butyl eatechol.

The divalent hydrocarbon radical represented by R in the above formulas can be aliphatic, cycloaliphatic or aromatic and can be saturated or have ethylenic or acetylenic unsaturation therein. Aliphatic radicals include aryl-substituted aliphatic radicals such as phenylethylene, phenylenedimethylene, etc.; aromatic radicals include alkyl, alkenyl and alkynyl substituted aromatic radicals such as tolylene, xylylene, ethylphenylene, vinylphenylene, propargylphenylene, etc.; and cycloaliphatic radicals include alkyl, alkenyl, alkynyl and aryl substituted cycloaliphatic radicals such as ethylcyclohexylcne, vinylcyclohexylene, propargylcyclohexylene, phenylcycloheptylene, tolylcyclopentylene, etc. The simpler and smaller of these radicals are preferred for obvious reasons, but the more complicated radicals can also be used and are included in the scope of this invention.

These divalent hydrocarbon radicals are illustrated by the following typical radicals: CI-I (CH (CH ),,CH=CH(CH and the like.

The organic moiety Z is the residue from the compound Z(CH X),,. This organic moiety can represent aliphatic, cycloaliphatic, aromatic groups and also a plurality of such groups, similar or dissimilar, connected to each other directly or through linking radicals such as O, S, S(O), S(O) NH, NR, --C(O), C(O)O, C- (O)NH-, C(O)NR, etc. Such groups may have derivative groups thereon, which do not interfere with the reaction between the Z(CH. ,X),, and Y'OP- (ORCX=CR' reagents, such as OR", OC(O)R", C(O)OR", NR NHR", SR", etc.

Typical monovalent Z groups include the various types defined and illustrated above for R" as well as other groups and are illustrated as H-, CH;,, C H,-,, C::H7' C4H9- 7 1s m 2i w n rF' CH:;C4;H4-\ C2H5C6H4', u s -1 CGHSCHIZCH:Z

wherein R is as defined above and Y is H, CH or Cl. Typical divalent Z groups include the various types defined and illustrated above for R and additional typi- Typical polyvalent Z groups having a valency higher than two are illustrated by the following typical groups:

(-cH -gH- OOC HqQH and the like. In the above formulas n is an integer advantageously of at least 3 The Z groups may also comprise halogen-containing groups which halogen contributes to flame retardant properties in the ultimate products and such typical halogen-containing Z groups include OOCHzCsHqized. Preferably a polymerization inhibitor is used during the preparation of the ester so that where polymerizable groups are present which have a strong tendency to polymerize polymerization may be conducted subsequently either by itself or with copolymerizable vinyl or vinylene monomer such as styrene, alphamethyl styrene, methacrylates. acrylates, maleic anhydride. unsaturated polyesters, etc., or the monomer may be used for various other purposes as indicated herein.

The period required to complete reaction varies according to the temperature used. For example at 100 C. a substantial amount of reaction is effected within l0 minutes, whereas at least minutes, preferably at least 1 hour, is desired to effect substantial reaction at 0 C. In most cases a period of 1-5 hours is used to insure complete reaction.

Instead of using the halogenated acetylenic alcohols with the phosphorus halides as shown in the above reaction, the acetylenic alcohol may be converted first to the ester and the acetylenic ester posthalogenated to the desired product. Ester exchange reactions can also be used to prepare the esters of this invention.

The (ORCX=CXR') type of esters of this invention differ from the esters of halogenated saturated alcohols, for example (OCH CHXCH X), having much greater hydrolytic stability of the halogen atoms than the latter type of esters which show a much greater tendency to lose halogen. This loss of halogen occurs under conditions of high humidity, thereby limiting the utility of the saturated compound.

The novel phosphorus-containing esters of this inven tion are self-extinguishing when ignited and thus are particularly useful as fire-retardant additives for a host of other materials and compounds, particularly those of a resinous or polymeric nature, for example, when added to polymethyl methacrylate, polystyrene, cellulose acetate, cellulose butyrate, the polyesters, the polyurethanes, rubbers, nylon and others. They can also be used as fire-retardant impregnants for porous bodies, such as paper. wood, fiberboard, cork, etc.

As organic compounds containing phosphorus and halogen atoms they are useful also as agricultural chemicals in the fields of insecticides. herbicides, pesticides, etc., as well as gasoline additivies to function as metal scavengers for anti-knock gasoline containing organo-lead, -boron or metallo-organo-compounds. Particularly are they useful as chemical intermediates in the synthesis of a host of other useful derivatives. The halo compounds can be halogenated further at the eth ylenic double bond to produce higher halogenated compounds which have even greater self-extinguishing properties than the dihalo compounds. They also add to olefinic double bonds of the unsaturated compounds to yield plasticizers as well as polymerizable monomers. They react with epoxy compounds to produce substi tuted alcohols which can be used as modifiers of urethane polymers, polyesters, cellulose, etc.

In addition, when the compounds or derivatives contain functional groups, such as the OH groups, they can be used as modifiers in polymerization reactions or can be reacted with other functional molecules such as with the isocyanates, acid anhydrides, acid chlorides, oxi rane compounds, etc., or when they contain an unsaturated olefinic group they can be homopolymerized or copolymerized with other monomers; or when they contain an amide group they can be reacted with aldehydes and polymerized alone or copolymerized with urea or melamine, or their methylol compounds can be reacted with cellulose or wool, etc.

Derivatives prepared from the compounds of this invention also find utility as flame-retardant additives and impregnants, as agricultural chemicals and as fuel additives. In addition, when the parent compounds or derivatives contain functional groups, such as the OH groups, they can be used as modifiers in polymerization reactions or can be reacted with other functional molecules such as with the isocyanates, acid anhydrides, acid chlorides, oxirane compounds, etc., or when they contain an unsaturated olefinic group they can be homopolymerized or copolymerized with other monomers; or when they contain an amide group they can be reacted with aldehydes and polymerized alone or copolymerized with urea or melamine, or their methylol compounds can be reacted with cellulose or wool, etc.

The practice of this invention is illustrated by the following examples. These examples are given merely by way of illustration and are not intended to limit the scope of the invention in any way nor the manner in which the invention can be practiced. Unless specifically indicated otherwise, parts and percentages are given as parts and percentages by weight.

EXAMPLE I One hundred forty-five parts of 1,2,3- trichloropropane are added to a solution of 106 parts of sodium carbonate dissolved in 900 parts of water and the mixture refluxed for 10 hours. The water layer is then separated from the oily layer which is dried over anhydrous sodium carbonate, separated by filtration and distilled. There is obtained 1 15 parts of 2,3-dichloro-2-propene-l-ol, CICH=CCICH OH, (I), b.p. 45-46 C./l.5 mm; yield 91%.

EXAMPLE II a. To 250 parts of carbon tetrachloride is added 56 parts of propargyl alcohol (A) and to this solution there is added slowly, at room temperature, a solution of parts of bromine in 250 parts of carbon tetrachloride and allowed to react at room temperature for 2 hours. Then the mixture is heated to 30-40 C. for 2 hours. The product is distilled to recover the carbon tetrachloride and the 2,3-dibromo-2-propene- 1 -ol, BrCH=CBrCH OH, (II), b.p. 5152 C./0.7 mm; yield 93%.

b. Treatment of l,2,3tribromopropene with aqueous sodium carbonate by the procedure of Example I yields the same 2,3-dibrom0-2-propene- 1 -ol.

EXAMPLE III The reaction of 2-methyl-3-butyn-2-ol (B) with NaOCl under an inert atmosphere of nitrogen according to the procedure given in the Bull, soc. chim. (France) p. 1615 (1965) gives an 87% yield of 4- chloro-2-methyl-3-butyl-2-ol,

(III),

b.p. 54-56 C./l8 mm. 1

This may be halogenated by the process of Example II to give the trihalo acetylenic alcohol or by similarly chlorinating to give Cl C=C( Cl )C( CH OH.

EXAMPLE IV The reaction of 2-mcthyl-3-butyl-2-ol in water with Br and NaOH by the procedure given in Ann. Chem.

(Rome), 47, 118 H957) yields 4-bromo2-methyl-3 Br C=C(Br)C(CH OH. butyn-Z-ol,

BI'CEC OH s XAMPLE V The procedure of Example [1(a) is repeated using inb.p. 9293 C122 mm This may be halogenated by the stead of propargyl alcohol, one equivalent weight of the process of Example ll to give the trihalo acetylenic alfollowing acetylenic alcohols to obtain the halocohol m derivative corresponding to the alcohol used:

Aeetylenie Alcohol Dibromoethylene Derivative H r r' H HC'='C-ZH OH (c) (v) H5 r r H HC C- H'-OH (D) (VI) H Hr Br Q H HC C-ZH OH (E) HC=CCa OH (VII) E P 1? E HC C-H -OH (F) (VIII) Q8 1 8 1 HC=C-CH OH (G) H- OH (IX) 0 H Br- Br 0 H Hc c-H -oH (H) H= 5- b-n (X).

H- rr H M G-g en (B) (XI) H r r H- HC C- OH (I) (XII) H r r H Hc c- 0H (J) (XIII) H r r H HC C8 'OH (K) (XIV) @23 H CC C-CH OH (L) CH3 CH2OH (XV) $2 H CC C-CH CH OH (M) CH C -CH CH OH (XVI) EL?" C H C C-(CH OH (N) C H -(CH OH (XVII) 3L2 Hq1C2 C CCH2OH (o) @1020 -CH OH (XVIII) H Br 1* H H CC C-CH $H 0H (P) n cbi-cn a on (XIX) Br Br CuH C CCH OH (Q) li c a-ca on (XX) r r C H C CCH OH (R) C H 2=2CH OH (XXI) 2r Br C H U CCH UH OH (s) C H =-cH cH oH (XXII) Continued Aeetylenie Alcohol a. To a solution of 56 parts of propargyl alcohol and 0.1 part of iodine in 300 parts of tetrachloroethylene is slowly passed chlorine gas while exposed to an ultraviolet lamp until 70 parts of chlorine are reacted. The halogenated product is then recovered by distillation and The halogenated acetylenic alcohols prepared in the above examples may be used in preparing the P(ORCX=CXR');; and HOP(ORCX=CXR') reagents used for preparing the new compositions of this inven' tion as illustrated in some of the following examples.

EXAMPLE VII 21. The phosphite ester,

V 3 P{-O-g-C=CH) 3 is prepared from PCI;; and

by the procedure given in US. Pat. No. 2,278,79l. Dec. 27. 1955, and converted by the procedure of Example ll(a) by reaction with Br to Magma...

Dib romoetmlene Derivative (XXIV) (XXV) (XXVI) (XXVII) (XXVIII) b. In a manner similar to the procedure of Vll(a) the acetylenic alcohols III, IV, C, D, L and M are converted to the phosphite esters, PORC 5 CR" and by post bromination to esters corresponding to the formula EXAMPLE Vlll A mixture of 46 parts of PCI;;, 126 parts of 2,3-dichloro-2-propene-l-ol and 150 parts of toluene is refluxed until no more HCl is evolved from the reaction. The mixture is then allowed to cool to room tem perature; then 5 parts of anhydrous sodium carbonate and 3 parts of decolorizing carbon are added to the solution and allowed to stand with stirring for 8 to 24 hours. The solution is then filtered and the filtrate distilled at 0.5 to 14 mm Hg pressure to recover the toluene. The yield of almost colorless residue is 96% of the theoretical amount. The infrared spectra of the product confirm the absence of the band for the OH group of the alcohol and the presence of the band for the ester group. The product is a viscous oil insoluble in water but soluble in benzene and toluene. The elemental analysis of the product: percent C, 26.95; percent H. 2.24; percent CI, 52.56; are in close agreement with the theoretical values of C, 26.42; H, 2.20; Cl, 52.02 for P(OCH CCI=CHCI);,. The boiling point of the product is higher than 120 C. at 0.5 mm Hg. Attempts to distill the product at higher pressure results in secondary reactions which change the nature of the product, which product, however, is still selflextinguishing. Other triesters of this type having other R groups in place of the CH and/or having bromine in place of the chlorine or having the tctrachloro or tetrabromo structure can be similarly prepared for use as intermediates in preparing phosphate esters of the present invention.

EXAMPLE lX A mixture of 10.15 parts of P(OCH- ,CCI=CHCI);; and 15 parts of CH COOH are heated at 100 C. for 2 hours following which it is distilled at l5 mm pressure to recover 42 parts of CH;,COOCH CCl=CHCl, leaving as a residue 86.2 parts of HOP(OCH- ,CCl=CHCl) which on analysis is shown to contain 46.4% of Cl compared to a theoretical value of 47.3.

Various other di and trihalogenated acetylenic alcohols can be used to prepare various HOP- (ORCX=CXR')- reagents suitable for use in the practice of this invention. By using other acids in place of the acetic acid. for example acrylic acid, more valuable byproducts such as CH %HCOOCH Cl=CHCl may be obtained.

EXAMPLE X A mixture of 40.6 parts of P(OCH CCl=CHCl);, and 8.2 parts ofP(OH).-;z1re heated at 75 C. for 3 hours and there is obtained the viscous product comprising as the major product 48.8 parts of HOP(OCH CCl=CHCl).

By substituting various other P( ORCX=CXR' )3 compounds for the P(OCH CCl=CHCl);,, other HOP- (ORCX CXR') reagents useful in the practice of this invention may be prepared.

EXAMPLE Xl a. An equimolar mixture of P(OCH CCl--CHCl) and CH =C(CH )COOCH Cl is heated at 100 C. for 3 hours in the presence of 0.5% t-butyl catechol following which the mixture is distilled to remove ClCH=CClCH Cl leaving as a residue the ester CH =C' (CH;,)-COOCH P(O)(OCH CCl=CHCl) The above product is verified by C, H, P, Cl and analyses.

b. The procedure of (a) is repeated using an equivalent amount of CH ==C(Cl)COOCH- ,Cl in place of the CH =C(CH -,)COOCH Cl to produce the ester of the formula CH =C(Cl)COOCH- ,P(O)- (OCH CCl=CHCl).

c. The procedure of (a) is repeated using equivalent amounts of CH CHCOOCH CI and P(OCH. CBr= CHBr) to give the ester having the formula CH2=CHCOOCH2P(O)(OCH2CBIT-CHBT)2 d. The procedure of (a) is repeated using equivalent amounts of CH CHCOOCH Cl and P(OCH CCl=CCl to give the ester having the formula e. The procedure of (a) is repeated using equivalent amounts of CH =C(CH )COOCH Br and P(OCH CCl CClto give the ester having the for mula f. The procedure of (a) is repeated using equivalent amounts of CH =C(CH;,)COOCH Cl and P[OC(CH CBr=CHBr];, to give the ester having the formula Reagents g. The procedure of (a) is repeated using equivalent amounts of CH =CHCOO(CH CI and P(OCH CCl=CHCl);; to give the ester of the formula h. The procedure of (a) is repeated using equivalent amounts of CH =CHCOO(CH- CI and HOP- (OCH- CCFCHCU to give the ester having the formula CH =CHCOOCH P( O)(OCH CCl=CHCl EXAMPLE Xll a. To 47.8 parts of HOP(OCH CBr=CHBr) in parts of toluene under a nitrogen atmosphere, there is added slowly at 20-30 C. a solution containing l00 parts of toluene, 13.5 parts of CH =CHQOOCH CH CL 0.5 parts of tertiary butyl catechol and 5.9 parts of trimethyl amine. and the mixture stirred for 3 hours. The precipitated amine hydrochloride (CH;,);,N.HCl is removed by filtration, and the filtrate containing the product is washed with distilled water until the washings are neutral. The toluene solution containing the polymerizable monomer.

can be used as prepared for the preparation of polymers and copolymers, or grafted to cellulose fibers. or the toluene can be removed by distillation at reduced pressures leaving an almost quantitative yield of the monomer.

The procedure of (a) is repeated a number of times using equivalent amounts of the reagents and obtaining the products indicated in the table below.

Product CH =CHCOOCH CH Cl Continued Reagents (d) HOP(OCH CCl=CHCl) (1") HOP(OCH CCl=CCl (h) HOP(OCH CBr=CBr (i) HOP(OCH CCl=CHCl) 2 Product CH2=CHOOCCH2P(O)- CH =CHOOCCH Cl ClCH=CC lCH C1 (k) HOP(OCH CC l=CHCl) 2 EXAMPLE Xlll Samples of the various phosphorus esters of Examples XI and XI] are placed individually in a microcrucible and in each case the contents ignited by the flame of a microburner. When the flame is withdrawn, in each case burning stops completely.

EXAMPLE XIV A mixture of50 parts of methyl methacrylate, parts of and 0.5 parts of benzoyl peroxide is polymerized in a v sealed container under nitrogen at 80 C. until a hard polymer is obtained, which is self-extinguishing. Similar self-extinguishing polymers are obtained when, instead of CH =CHCOOCH CH (OCH CBr=CHBr) 2 the individual esters of Examples XI and X" are used.

EXAMPLE XV The procedure of Example XIV is repeated using instead of methyl methacrylate. the monomers styrene,

(OCH CCl=CHCl) 2 CH -CHCH P(O)- (v) 2 2 H (OCH CC1=CHCl) 2 acrylonitrile and vinyl acetate respectively, and self extinguishing polymers are obtained in each case.

EXAMPLE XVI Ten parts of EXAMPLE XVll A skein of 20 parts of cotton thread is placed in 500 parts of an aqueous solution containing 2.5 parts NaOH, 2.5 parts CS and 0.05 parts of sodium dodecyL benzene sulfonate and allowed to stand for 30 minutes. The thread is then removed, washed thoroughly with distilled water, and immersed in 500 parts of a solution containing 0.05 parts of FeSO,.(NH, SO, and 1.5 parts oftetra-bis-hydroxymethyl phosphonium chloride for minutes. The thread is then washed with distilled water and suspended in 1000 parts of an emulsion containing 8 parts of CH- CHCOOCH CH HOy (OCH CBFCHBU 0.1 parts of sodium dodecylbenzene sulfonate and 1.5 parts of hydrogen peroxide and the mixture heated with agitation under nitrogen for 3 hours. The thread is then removed, washed with water and dried. There is obtained 28 parts of grafted thread, which when suspended and its end ignited, is selfextinguishing when the source of the flame is withdrawn.

EXAMPLE XVIII A mixture of 50 parts it CH =CHCOOCH CH P(OCH CBr= CHBI') 50 parts of toluene and 0.5 parts of benzoyl peroxide 7 is polymerized in a sealed container under nitrogen and at 80 C. for 10 hours. The toluene is evaporated to give a solid resin. Five parts of this is mixed with l00 parts respectively of polystyrene. polymethyl methacrylate, polyacrylonitrile, polybutadiene. polyvinylacetate and molded in each case to a hard casting. In each case attempts to ignite each casting showed the product to be self-extinguishing in each casev The procedure is repeated with each of the other monomers of Examples XI and XII and in each case the product is found to be self-extinguishing,

As shown above the phosphorus-containing esters of this invention having acrylic groups therein are polymerizable by themselves or in mixtures with each other or in mixtures with other vinyl or vinylidene monomers, sometimes referred to herein as vinyl monomers, such as styrenes, i.e., styrene, alphamethylstyrcne. vinyl naphthalene, vinyl diphenyl, etc., with acrylates. such as methyl acrylate, methyl methacrylate, butyl acrylate, ethyl chloracrylate, etc, vinyl esters such as vinyl aeetate, vinyl benzoate, vinyl butyrate, etc., acrylonitrile, methacrylonitrile, esters of polymerizable dibasic acids such as dimethyl maleate, diethyl fumarate, diallyl phthalate, divinyl azelate, dimethyl itaconate, etc., ma leic anhydride, itaconic anhydride, etc.

In producing self-extinguishing copolymers with such copolymerizing monomers, such properties are exhibited with as little as 0.1 percent by weight, preferably at least 1 percent by weight, of a monomer of this invention. In blends of homopolymers or copolymers of these phosphorus-containing esters with other polymers, such as polystyrene, etc., there is advantageously at least 0,l percent, preferably at least 1 percent by weight, of the product represented by the phosphoruscontaining ester portion.

In polymerizing such acrylic esters of this invention the various polymerization systems and techniques known in the art may be used, such as free-radical, e.g. peroxy and azo systems, thermal. radiation and various other systems. For most purposes for which the polymer products are to be used molecular weights of at least 500, preferably at least L000. are desirable.

As indicated above and where it may be desired. these polymers can be produced directly with the preparation of the ester by omitting the inhibitor and allow ing polymerization to occur simultaneously. If the poly merization has not progressed sufficiently by the time the preparation reaction is completed. heating may be continued at the same or higher temperatures, or catalysts, such as benzoyl peroxide. etc. may be added to complete the polymerization.

While such acrylic esters or monomers of this inven tion have been represented by various formulas, they may also be represented generically by the formula wherein n represents an integer having a value of 0 or 1 and the other symbols have the definitions given above.

Similarly the repeating units in polymers produced from these esters can be represented by the formula Polymers having repeating units similar to those produced by polymerizing the monomer esters of this invention may also be produced by polymerizing an acrylate portion of the monomer, such as a (chloroalkyl)acrylate and reacting the remainder of the ester monomer repeating unit by reactions similar to those used in preparing the monomer. For example, poly(betachlorethyl)acrylate may be dissolved or suspended in toluene, etc., and then reacted with an appropriate amount of HOP(ORCX=CXR') or P(ORCX=CXR');; to give repeating units having the formula When copolymers of the polymerizable monomers of this invention are prepared with styrene, methyl methacrylate, vinyl acetate, acrylonitrile, etc. as comonomers, the fire retardant effect is noted when as little as 0.1% of the halogenated monomer is present and preferably at least 1% by weight is used.

Other polymerizable and nonpolymerisable compounds are also prepared by the process of Examples XI and XII using in place of the acrylic starting esters of those examples and without the polymerization inhibitor where appropriate, various other CH X containing compounds having the formula Z(CH X),,.

EXAMPLE XIX A mixture of one mole of P(OCH CCl=CHCl);, and 1 mole of CH =CHCH CI are heated at C. for 3 hours, following which the mixture is distilled to re cover CICH CCICH- CI, leaving as a residue, the prod- UCI Q CH =CHCH P OCH CCl=CHC1) 2 The analyses for C. H. P, O and Cl confirm the identity of this structure.

EXAMPLE XX EXAMPLE XXI The procedure of Example XX is repeated using each time an equivalent amount of P(OCH CBr=CHBr);, and there are obtained:

(b) CH (CH C1) EXAMPLE XXII a. To a toluene solution containing one mole of HOP- (OCH- CBr=CHBr) there is slowly added, at 20-30 C. and under a nitrogen atmosphere, a toluene solution containing one mole of CH =C(CH )CH Br and one mole of trimethylamine. After the mixture is stirred for 3 hours, the precipitated amine hydrohalide is removed by filtration, and the filtrate containing the product When the above procedure is repeated in each case using I HOP(OCH CCl=CHCl) as the phosphoruscontaining reagent the corresponding chlorinated products are obtained. These same compounds may be prepared by starting with P(OCH CBr=CHBr) (and the corresponding chlorine derivative) and using the procedure of Example XIX.

EXAMPLE XXlIl The procedure of Example XXll is repeated a number of times, using 1 mole of HOP(OCH CBr=CHBr) and 1 mole of (CH;,);;N for each equivalent of --CH- X in the respective compounds, and using the following polyvalcnt compositions with production of the indipeated a number of times using in place of the hydroxy cated products: phosphorus dihaloacetylenic compounds a variety of Cl-GH CH CH(CH 01) CH[CH P(O) (OCH CBr=CHBr) 1 CH2CH2P(O) (OCH CBr=CHBr) ap-cn cH o-m pca Ho'-] H H PtO) (ocH cBr=cHBr) 10 When the procedures of Example XXIII are repeated halogenated compounds as indicated below with the using equivalent amounts of HOP(OCH CCl=CI-ICl) product in each case containing the corresponding the corresponding chlorinated products are obtained. phosphorus halogenated acetylenic groups therein:

EXAMPLE XXIV 1. HOP( 0CI'I CBI CBl' b. HOP(OCH CCl=CCl- The procedures of Examples XIX and XXI are re- HOPlOCH(C( H )CCI:CHCI]2 peated a number of times using, in place of the respec- HOP[OCH(C(' H'II)CCIZCHCHZ tive phosphorus dihaloacetylenic compounds a variety O HOP!OCH(C;HQ)CH0CCI:CHC]12 of halogenated compounds as indicated below with the f HoploCcHflj'cl'zcHno product in each case containing the corresponding g HOP[OCfiH4CGH4CBr;CHBr]2 phosphorus halogenated acetylenic groups therein: h HOP(OCH )C H4CH2CCIZCHCI)0 HOCHflBFCBTW i. H0P ocii cci==ccic H i WOCHZCCFCQW j. HOP(OCH CCl=CClCH;,) HOCHICHZCBFCBFQ) kt HOP(OCH CBr=CBrC H PIOWHZMCCECCLII l. HOP(OCH CBr=CBrC H e. P[O(CH- );,CBr=CHBr] f. P[O(CH CCl CI-ICH g. P(OCH. CBi=CBrCH;,) EXAMPLE h. P(OCI-I CClCClC H Samples of each of the various phosphorus esters of i. P(OCH CCl=CClC.;H Examples XIX through XXV are placed individually in j. P(OC ;H CCI=CHCI) a microcrucible and in each case the contents ignited k. P(OC H CBr=I-IBr) by the flame of a microburner. When the flame is withl. P[OCH- CCI=CCI(CH CH L, drawn, burning stops completely in each case. When tested in various compositions as in Example XVI the various esters of these examples show similar fire retar The procedures of Examples XXII and XXIII are redant properties. These effects are noted with as little as EXAMPLE XXV 0.1%. preferable at least 1% of the phosphorus halide ester.

EXAMPLE XXVll An equimolar mixture of vinylbenzyl chloride, CH =CHC H CH CL and P(OCH CCl=CHCl) is reacted by the procedure of Example Xl(a) leaving as a residue CH =CHC.;H CH P(O)(OCH CCl=CHCl) as a viscous oil whose elemental analyses for P and C] are in good agreement with the calculated values for the compound. Polymerization of this monomer by the procedure of Example XIV yields a self-extinguishing polymer having the repeating unit The corresponding bromo derivatives are prepared and polymerized in the same manner and with similar results.

While certain features of this invention have been described in detail with respect to the various embodiments thereof, it will, of course, be apparent that other modifications may be made within the spirit and scope of this invention, and it is not intended to limit the invention to the exact details shown above except insofar as they are defined in the following claims:

The invention claimed is:

l. A phosphorus-halogen-containing compound hav ing the formula wherein n represents an integer having a value of l to Z represents an organic monomeric nucleus of no more than carbon atoms, valency of n and selected from the class consisting of aliphatic, aromatic and cycloaliphatic hydrocarbon radicals, combinations of 26 of said hydrocarbon radicals linked together by connecting groups O, S-. S(O), S(O). NH-, NR, C(O). -C(O)(), C(O)NH or c- (O)NR", and derivatives of said hydrocarbon radicals in which the derivative group is OR",

OC(O)R, C(O)R", NR. -NHR" or SR"; X represents Cl or Br; R represents a divalent hydrocarbon radical of l-20 carbon atoms; R represents H, X or R"; and R represents a monovalent hydrocarbon radical of l-ZO carbon atoms. 2. The compound of claim 1 in which Z represents a monovalent organic moiety.

3. The compound of claim 2 in which said monovalent moiety is an acrylic radical having the formula wherein Y represents H, CH or Cl; R represents a divalent hydrocarbon radical having l-2O carbon atoms; and

n is an integer having a value of zero or one.

4. The compound of claim 3 which has the formula CH =C(Y)COO(R) CH P(O)(ORCCI=CCIR') 5. The compound of claim 3 which has the formula CH. ,=C( Y )COO( R) CH P(O)(ORCB1=CBrR 6. The compound of claim 1 in which Z is a divalent organic moiety.

7. The compound of claim 1 in which Z is a polyvalent organic moiety having a valency of at least 3.

8. The compound of claim 1 having the formula CH =CHOOCCH P(O)(OCH CX=CHX).

9. The compound of claim 1 having the formula RCX=CXCH P(O)(ORCX=CXR' 10. The compound of claim 1 having the formula l 1. The compound of claim 1 having the formula C- H =CHC ;H CH P( O)( ORCX=CXR' 12. The compound of claim 11 in which X is chlorine.

13. The compound of claim 11 in which X is bromine.

l4. The compound of claim 11 in which R is X. 

1. A PHOSPHURUS-HALOGEN-CONTAINING COMPOUND HAVING THE FORMULA
 2. The compound of claim 1 in which Z represents a monovalent organic moiety.
 3. The compound of claim 2 in which said monovalent moiety is an acrylic radical having the formula
 4. The compound of claim 3 which has the formula CH2 C(Y)COO(R)-CH2P(O)(ORCCl CClR'')2.
 5. The compound of claim 3 which has the formula CH2 C(Y)COO(R)-CH2P(O)(ORCBr CBrR'')2.
 6. The compound of claim 1 in which Z is a divalent organic moiety.
 7. The compound of claim 1 in which Z is a polyvalent organic moiety having a valency of at least
 3. 8. The compound of claim 1 having the formula CH2 CHOOCCH2P(O)(OCH2CX CHX)2.
 9. The compound of claim 1 having the formula R''CX CXCH2P(O)(ORCX CXR'')2.
 10. The compound of claim 1 having the formula
 11. The compound of claim 1 having the formula CH2 CHC6H4CH2P(O)(ORCX CXR'')2.
 12. The compound of claim 11 in which X is chlorine.
 13. The compound of claim 11 in which X is bromine.
 14. The compound of claim 11 in which R'' is X. 